JPH0596659A - Manufacture of roller - Google Patents
Manufacture of rollerInfo
- Publication number
- JPH0596659A JPH0596659A JP26233691A JP26233691A JPH0596659A JP H0596659 A JPH0596659 A JP H0596659A JP 26233691 A JP26233691 A JP 26233691A JP 26233691 A JP26233691 A JP 26233691A JP H0596659 A JPH0596659 A JP H0596659A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- elastic body
- elastic
- resin tube
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 14
- 239000000057 synthetic resin Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 19
- 229920002379 silicone rubber Polymers 0.000 abstract description 11
- 229920005989 resin Polymers 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 10
- 239000004945 silicone rubber Substances 0.000 abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 4
- 239000011261 inert gas Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001774 Perfluoroether Polymers 0.000 description 2
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子複写機やレーザプ
リンタ等のトナー定着部に用いられるローラの製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a roller used in a toner fixing section of an electronic copying machine, a laser printer or the like.
【０００２】[0002]
【従来の技術】電子複写機やレーザプリンタのトナー定
着部ローラは、加熱ローラと加圧ローラから構成され、
加熱ローラにより熱せられたトナーを加圧ローラにより
その間を通過される紙に圧着して紙上に転移されてプリ
ントされている。このような定着部ローラは通紙の安定
性を図るため、適度な弾性とトナーとの離型性のよいも
のが要求される。加えて、定着部ローラを搭載する電子
複写機やレーザプリンタの高速化、小型化の要求に伴
い、小型化、高速化が問題となっている。そのため芯金
上に適度な弾性を有する弾性体を設け、その上層に離型
性のよい最外層が積層された多層構造のローラが用いら
れている。2. Description of the Related Art A toner fixing section roller of an electronic copying machine or a laser printer is composed of a heating roller and a pressure roller,
The toner heated by the heating roller is pressed onto the paper passing between them by the pressure roller, transferred onto the paper, and printed. Such fixing unit rollers are required to have appropriate elasticity and good releasability from the toner in order to stabilize the paper passing. In addition, downsizing and speeding up have become a problem with the demands for speeding up and downsizing of electronic copying machines and laser printers equipped with fixing unit rollers. Therefore, a roller having a multi-layer structure is used in which an elastic body having appropriate elasticity is provided on a cored bar, and an outermost layer having good releasability is laminated on the elastic body.
【０００３】このような多層構造のローラのうち、特に
芯金の内部にヒータが挿入される加熱ローラは、耐熱性
であり、しかも熱伝導性がよくなければならず、弾性体
としてシリコーンゴムやフッ素ゴムを使用し、最外層と
してパーフロロアルコキシ樹脂（ＰＦＡ樹脂）や、ポリ
テトラフロロエチレン樹脂（ＰＴＦＥ樹脂）等のフッ素
樹脂が採用されている。これらの最外層を形成するに
は、芯金上に設けられた弾性体上にフッ素樹脂を静電粉
体塗装したり、ディスパージョンを塗布、焼付ける等の
方法が採られていた。Among the rollers having such a multi-layered structure, the heating roller in which the heater is inserted inside the core must be heat resistant and have good thermal conductivity. A fluororubber is used, and a fluororesin such as a perfluoroalkoxy resin (PFA resin) or a polytetrafluoroethylene resin (PTFE resin) is used as the outermost layer. In order to form these outermost layers, methods such as electrostatic powder coating of a fluororesin on the elastic body provided on the cored bar, application of a dispersion, and baking have been adopted.
【０００４】しかし、フッ素樹脂を弾性体上に均一に塗
布するのは難しく、また、塗布後フッ素樹脂が硬化する
間ローラを常に回転させた状態に維持しなければ偏肉が
生じてしまった。また、塗布後、硬化のための加熱も均
一に行わなければ膜厚が一定にならなかった。ローラに
偏肉が生じると、トナー定着が均一になされず、高画質
の複写がなされなくなってしまう。However, it is difficult to uniformly apply the fluororesin onto the elastic body, and uneven thickness occurs unless the roller is kept constantly rotated during the curing of the fluororesin after application. Further, after the application, the film thickness was not constant unless the heating for curing was performed uniformly. If the rollers have uneven thickness, the toner cannot be fixed uniformly and high-quality copying cannot be performed.
【０００５】さらに、塗布液中に異物が混入すると、外
観異常が発生してしまうため、塗布液中に異物の混入を
防止するための管理が必要で作業効率が悪かった。しか
も、弾性体層を形成するシリコーンゴムよりも高い融点
を有するフッ素樹脂を硬化するための高温加熱は、シリ
コーンゴムの劣化を招いてしまった。Further, when foreign matter is mixed in the coating liquid, an abnormal appearance occurs, and therefore management is required to prevent foreign matter from being mixed in the coating liquid, resulting in poor work efficiency. Moreover, the high temperature heating for curing the fluororesin having a melting point higher than that of the silicone rubber forming the elastic layer has caused deterioration of the silicone rubber.
【０００６】[0006]
【発明が解決すべき課題】そのため、芯金上に弾性体を
形成し、最外層となるチューブに挿入してチューブ被覆
ローラを形成する方法が用いられている。チューブ被覆
ローラの製造方法としては、熱収縮チューブを使用する
方法と、非収縮性チューブを使用する方法がある。熱収
縮性チューブを用いる場合は、芯金上に弾性体を形成し
た弾性ローラの外径より大きな内径を有する熱収縮性チ
ューブに弾性ローラを挿入し加熱してチューブを収縮さ
せ弾性ローラ外周に被覆する。しかしながら、熱収縮性
チューブを均一な膜厚に製造するのは困難であって偏肉
は避けられず、しかも高価であった。また、収縮率の調
整もむずかしく、弾性体との接着時にしわが発生してし
まう等の問題もあり、チューブと弾性体との接着は弱か
った。Therefore, a method is used in which an elastic body is formed on a cored bar and is inserted into a tube which is the outermost layer to form a tube covering roller. As a method for manufacturing the tube covering roller, there are a method using a heat shrinkable tube and a method using a non-shrinkable tube. When using a heat-shrinkable tube, insert the elastic roller into a heat-shrinkable tube that has an inner diameter larger than the outer diameter of the elastic roller with an elastic body formed on the core metal, heat the tube to shrink the tube, and cover the outer circumference of the elastic roller. To do. However, it is difficult to manufacture a heat-shrinkable tube with a uniform film thickness, and uneven thickness is inevitable, and it is expensive. Further, it is difficult to adjust the shrinkage rate, and there is a problem that wrinkles are generated at the time of bonding with the elastic body, and the bonding between the tube and the elastic body is weak.
【０００７】また、非収縮性チューブを用いる場合、偏
肉のない均一な厚さのチューブが廉価で得られるが、特
に加熱ローラの場合は弾性体が薄く形成されるため、加
熱時の弾性体の膨張も大きくなく膨張圧も小さいため、
チューブのと弾性ローラとの接着力が弱かった。特に最
外層としてフッ素樹脂を用い、弾性体としてシリコーン
ゴムを用いた場合は相互に加熱融着して一体化されにく
く、満足のいく接着力を得ることはむずかしかった。こ
のため、ローラの寿命も短くなってしまった。Further, when a non-shrinkable tube is used, a tube having a uniform thickness with no uneven thickness can be obtained at a low price. However, particularly in the case of a heating roller, the elastic body is formed thin, so that the elastic body during heating can be obtained. Since the expansion of is not large and the expansion pressure is small,
The adhesion between the tube and the elastic roller was weak. In particular, when a fluororesin is used as the outermost layer and a silicone rubber is used as the elastic body, it is difficult to heat-bond each other and to integrate them, and it is difficult to obtain a satisfactory adhesive force. Therefore, the life of the roller is shortened.
【０００８】上記のような欠点を解消するため、本発明
は弾性体と、最外層とが強固に接着されローラ外径が高
精度に均一なため、トナー定着が均一に行われ、しかも
弾性体が劣化されず、長寿命のローラの製造方法を提供
することを目的とする。In order to solve the above-mentioned drawbacks, the present invention firmly adheres the elastic body to the outermost layer and makes the outer diameter of the roller uniform with high precision, so that the toner is fixed uniformly and the elastic body is made. It is an object of the present invention to provide a method of manufacturing a roller that does not deteriorate and has a long life.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、本発明のローラの製造方法は、芯金上に弾性体を形
成した弾性ローラを合成樹脂チューブに挿入し、前記弾
性体と前記合成樹脂チューブを接着してローラを作成す
るに際し、前記合成樹脂チューブに前記弾性ローラを挿
入した後、加熱ガス中に加圧状態で放置するものであ
る。In order to achieve the above object, in the method for manufacturing a roller of the present invention, an elastic roller having an elastic body formed on a cored bar is inserted into a synthetic resin tube, and the elastic body and the synthetic body are combined. When a resin tube is adhered to form a roller, the elastic roller is inserted into the synthetic resin tube and then left in a heated gas under pressure.
【００１０】[0010]
【作用】芯金上に弾性体が形成された弾性ローラをトナ
ーとの離型性のよい最外層となる合成樹脂チューブに、
弾性体表面あるいはチューブの内壁にプライマーを塗布
した後、挿入する。その後不活性ガス等の加熱ガス中に
加圧状態で放置する。このため、弾性体が劣化しない温
度でローラ外周を均一に加熱し、しかも均一に加圧し
て、弾性体と合成樹脂チューブとを押圧して圧着させ
る。よって弾性体と合成樹脂チューブが強固に接着さ
れ、長寿命のローラが得られる。[Function] An elastic roller having an elastic body formed on a core metal is attached to a synthetic resin tube which is an outermost layer having good releasability from toner,
Insert after applying the primer to the surface of the elastic body or the inner wall of the tube. Then, it is left under pressure in a heating gas such as an inert gas. For this reason, the outer periphery of the roller is uniformly heated at a temperature at which the elastic body does not deteriorate, and moreover, it is uniformly pressed, and the elastic body and the synthetic resin tube are pressed and pressure-bonded. Therefore, the elastic body and the synthetic resin tube are firmly adhered to each other, and a long-life roller can be obtained.
【００１１】[0011]
【実施例】本発明のローラの製造方法を加熱ローラの製
造方法に適用した一実施例を図面を参照して説明する。
本発明により製造される加熱ローラを図１に示す。図１
においてローラである加熱ローラ１は、芯金２の外周に
弾性体３が積層された弾性ローラ４上に最外層５を備え
たものである。芯金２は内部にヒータが挿入されるた
め、熱伝導率がよく外周に設けられる弾性体との接着が
よい材質、例えば鉄、アルミニウム等で形成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the roller manufacturing method of the present invention is applied to a heating roller manufacturing method will be described with reference to the drawings.
A heating roller manufactured according to the present invention is shown in FIG. Figure 1
The heating roller 1, which is a roller, is provided with the outermost layer 5 on the elastic roller 4 in which the elastic body 3 is laminated on the outer circumference of the cored bar 2. Since the cored bar 2 has a heater inserted therein, it is formed of a material having good thermal conductivity and good adhesion to an elastic body provided on the outer periphery, such as iron or aluminum.
【００１２】また、弾性体３は熱の伝導率が高く、しか
も熱による劣化が少ないものが好ましく、また通紙性を
満足する適宣な弾性を備えたものであり、シリコーンゴ
ム、フッ素樹脂等から成る。さらに最外層５（合成樹脂
チューブ）は、熱による劣化が少なくトナーとの離型性
に優れ、摩擦係数の少ないものが好ましい。このような
ものとしてパーフロロアルコキシ樹脂（ＰＦＡ樹脂）、
ポリテトラフロロエチレン樹脂（ＰＴＦＥ樹脂）等のポ
リフッ化エチレンが用いられる。The elastic body 3 preferably has high heat conductivity and little deterioration due to heat, and has appropriate elasticity to satisfy the paper passing property, such as silicone rubber and fluororesin. Consists of. Further, it is preferable that the outermost layer 5 (synthetic resin tube) has little deterioration due to heat, is excellent in releasability from the toner, and has a small friction coefficient. As such, perfluoroalkoxy resin (PFA resin),
Polyfluoroethylene such as polytetrafluoroethylene resin (PTFE resin) is used.
【００１３】このような加熱ローラ１を製造するにはま
ず、芯金２上に弾性体３を形成し、弾性ローラ４を作成
する。弾性ローラ４を作成するには芯金２の表面にプラ
イマー塗布し、この上に縮合反応型常温硬化シリコーン
ゴム（ＲＴＶ）、付加反応型シリコーンゴム（ＬＴＶ）
等の液状シリコーンゴムを金型へ注入して形成したり、
熱加硫型シリコーンゴム（ＨＴＶ）を押し出しにより、
またはシート状に形成したものをプライマー塗布された
芯金２に巻付け等により形成する。得られた弾性ローラ
４の表面を必要に応じて研削する。その後弾性ローラ４
を最外層５を形成するフッ素樹脂チューブに挿入し、弾
性ローラ４にフッ素樹脂チューブを被覆する。フッ素樹
脂チューブに挿入するには弾性ローラ４を単にフッ素樹
脂チューブに挿入してもよいし、また、円筒金型を用
い、円筒金型内壁に吸着させた後、挿入してもよい。To manufacture such a heating roller 1, first, the elastic body 3 is formed on the cored bar 2 and the elastic roller 4 is prepared. To make the elastic roller 4, a primer is applied to the surface of the core metal 2, and a condensation reaction type room temperature curing silicone rubber (RTV) and an addition reaction type silicone rubber (LTV) are formed on the surface of the core metal 2.
It is formed by injecting liquid silicone rubber such as
By extruding heat vulcanizing silicone rubber (HTV),
Alternatively, a sheet-shaped product is wound around the core metal 2 coated with a primer or the like. The surface of the obtained elastic roller 4 is ground as required. Then elastic roller 4
Is inserted into the fluororesin tube forming the outermost layer 5, and the elastic roller 4 is covered with the fluororesin tube. In order to insert the elastic roller 4 into the fluororesin tube, the elastic roller 4 may be simply inserted into the fluororesin tube, or a cylindrical mold may be used, and the elastic roller 4 may be sucked onto the inner wall of the cylindrical mold and then inserted.
【００１４】その後、フッ素樹脂チューブに挿入された
弾性ローラを圧力炉等の密封炉内に設置する。圧力炉内
に窒素や、不活性ガス等を充填し加熱する。使用される
ガスは反応性のないものならば何れのガスでも使用でき
る。加熱温度は弾性体を形成するシリコーンゴムが劣化
しない温度が好ましく８０°〜１８０℃である。この時
の圧力炉内の圧力はフッ素樹脂チューブとシリコーンゴ
ムが強固に接着するのに必要な圧力とし、製造時間も短
時間でよいように１００ｋｇ／ｃｍ2以上が好ましい。
加熱温度、圧力及び、時間は各々関係し、適宣選択でき
るが１５０℃で２００ｋｇ／ｃｍ2の圧力ならば５分間
が好ましい。After that, the elastic roller inserted in the fluororesin tube is set in a sealed furnace such as a pressure furnace. Nitrogen or an inert gas is charged into the pressure furnace and heated. Any gas can be used as long as it has no reactivity. The heating temperature is preferably 80 ° to 180 ° C. at which the silicone rubber forming the elastic body is not deteriorated. At this time, the pressure in the pressure furnace is set to a pressure necessary for firmly adhering the fluororesin tube and the silicone rubber, and is preferably 100 kg / cm 2 or more so that the manufacturing time can be short.
The heating temperature, pressure and time are related to each other and can be appropriately selected, but if the pressure is 150 ° C. and the pressure is 200 kg / cm 2 , 5 minutes is preferable.
【００１５】このようにして得られた加熱ローラ１は最
外層５と弾性体３とが強固に接着され、しかも弾性体が
最外層形成時に劣化されず耐久性の優れたものである。
以上の説明は本発明を加熱ローラ製造に適用した一実施
例であるが、本発明はこれに限定されない。即ち、最外
層と成るチューブに挿入してチューブとの接着を図るも
のならば何れのローラにも適用できる。The heating roller 1 thus obtained is such that the outermost layer 5 and the elastic body 3 are firmly adhered to each other, and the elastic body is not deteriorated when the outermost layer is formed and has excellent durability.
The above description is one example in which the present invention is applied to manufacturing a heating roller, but the present invention is not limited to this. That is, it can be applied to any roller as long as it can be inserted into the outermost tube and adhered to the tube.
【００１６】[0016]
【発明の効果】以上の説明からも明らかなように、本発
明のローラの製造方法によれば、合成樹脂チューブと、
弾性ローラとを加熱融着する際、加圧下で行うため、合
成樹脂チューブと弾性ローラとが強固に接着される。そ
のため、加熱温度も弾性体が劣化するような高温で行う
必要がなく、長寿命なローラが得られる。しかも最外層
をチューブで形成するため、フッ素樹脂の液状塗布剤を
塗付、焼付することがないため塗布剤に異物が混入しな
いように管理する必要もなく簡単に製造できる。As is apparent from the above description, according to the roller manufacturing method of the present invention, a synthetic resin tube,
When the heat-bonding with the elastic roller is performed under pressure, the synthetic resin tube and the elastic roller are firmly adhered. Therefore, the heating temperature does not have to be high enough to deteriorate the elastic body, and a long-life roller can be obtained. Moreover, since the outermost layer is formed of a tube, there is no need to apply or bake a liquid coating agent of a fluororesin, and therefore there is no need to manage so that no foreign matter is mixed into the coating agent, so that the coating can be easily manufactured.
【図１】本発明を適用したローラの断面図。FIG. 1 is a sectional view of a roller to which the present invention is applied.
１‥‥‥加熱ローラ（ローラ） ４‥‥‥弾性ローラ ５・・・・・・最外層（合成樹脂チューブ） 1 ... heating roller (roller) 4 ... elastic roller 5 ... outermost layer (synthetic resin tube)
Claims (1)
成樹脂チューブに挿入し、前記弾性体と前記合成樹脂チ
ューブを接着してローラを作成するに際し、前記合成樹
脂チューブに前記弾性ローラを挿入した後、加熱ガス中
に加圧状態で放置することを特徴とするローラの製造方
法。1. An elastic roller formed by forming an elastic body on a core metal is inserted into a synthetic resin tube, and the elastic body and the synthetic resin tube are adhered to each other to form a roller. A method for manufacturing a roller, characterized in that the roller is left under pressure in heated gas after being inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26233691A JPH0596659A (en) | 1991-10-09 | 1991-10-09 | Manufacture of roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26233691A JPH0596659A (en) | 1991-10-09 | 1991-10-09 | Manufacture of roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0596659A true JPH0596659A (en) | 1993-04-20 |
Family
ID=17374348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26233691A Withdrawn JPH0596659A (en) | 1991-10-09 | 1991-10-09 | Manufacture of roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0596659A (en) |
-
1991
- 1991-10-09 JP JP26233691A patent/JPH0596659A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990107 |